Means for discharging fluids from drying-cylinders.



No. 796,773. PATENTED AUG. 8, 1905. R. DA. "L'AGKABBRRY.

MEANS FOR DISGHARGINCT FLUIDS PROM DRYING CYLINDERS.

APPLICATION 2mm AUG. 24, 1904.

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WITNESSES:

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PATENTED AUG. 8, 1905 R. D. TAGKABERRY. MEANS FOR DISGHARGING FLUIDSPROM DRYING CYLINDERS.

APPLICATION FILED AUG. 2-1, 1904.

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No. 796,773. PATENTED AUG. 8, 1905. B. D. TAGKABBRRY.

MEANS FOR DISGHARGING FLUIDS PROM DRYING CYLINDERS.

- APPLICATION FILED menu, 1904.

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WITNESSES: /VVE/WQR INBRE;V. a. 0mm: co.v PNQ10-LTYNOGRAPHERS, msmuamw.n. c.

UNITED STATES PATENT OFFICE.

ROBERT DANIEL TACKABERRY, OF LEWISTON, MAINE.

Specification of Letters Patent.

Patented Aug. 8, 1905.

Application filed August 24, 1904. Serial No. 221,964-

To aZZ whom it may concern.-

Be it known that I, ROBERT DANIEL TAOKA- BERRY, a citizen of the UnitedStates, and a resident of Lewiston, in the county of Androscoggin andState of Maine, have invented a new and Improved Means for DischargingFluids from Drying-Cylinders, of which the following is a full, clear,and exact description.

The invention relates to improved devices for expelling the air andwater of condensation from drying-cylinders-for example,such as aredisclosed in the prior patent to Paul, No. 643,198, dated February 13,1900.

The object of the present invention is to simplify the devices as muchas possible, and also to maintain uniform and equal pressures in thevarious parts of the system. I attain this end by providing outlets fromthe cylin der or cylinders extending to a steam-trap, which ispreferably of the sort disclosed in my prior patent for steam-traps, No.743,952, dated November 10, 1903, and in my copending application forsteam-traps, Serial No. 178,977, filed October 29, 1903, and I establishby a pipe or equivalent means communication between the steam-space ofthe steamtrap and the steam-space of the drying-cylinder so that therushes or pulsations of water passing into the trap from the cylinderwill be prevented from raising the pressure in the latter. Suchcommunicating-pipe is provided with a vent and stop valves facilitatingthe initial removal of the air from the cylinders, which air is forcedby the steam through the said outlet-pipe into and through the trap andout into the atmosphere through the said communicating-pipe.

The invention resides in certain special features of construction andarrangement of parts, which will be fully hereinafter set forth, andparticularly pointed out in the claims.

Reference is to be had to the accompanying drawings, forming a part ofthis specification,

in which similar characters of reference indicate corresponding parts inall the figures.

Figure 1 represents a side elevation of a drying-machine containingseveral dryingcylinders and illustrating my improvement applied thereto.Fig. 2 is an end elevation of the same with parts broken away, and Fig.3 is a cross-section through one of the cylinders.

10 indicates the drying-cylinders, which, as here shown, are seven innumber, revolubly mounted in a framing having hollow parts 11 and 12.Steam-supply pipes 14 pass into said hollow framing parts at one side ofthe machine and air and Water discharging pipes 15 pass from the hollowframing parts at the other side, the interiors of the cylinderscommunicating with the hollow framing parts, so thatsteam may besupplied to the cylinders and the air and water of condensation withdrawn, all of which will be understood from the prior art, andparticularly from the patent to Paul above referred to.

16 indicates a steam-trap, which may be of any desired sort, butpreferably that forming the subject of my prior patent and also that ofmy pending application above noted. The pipes 15 run into a commonextension 17 which conducts the air and water to the trap and from whichthe water is discharged through the pipe 18. Passing from the top partor steam-space of the trap 16 is an equalizing-pipe 19, which is bestshown in Fig. 3, communicating with the steam-space of thedrying-cylinder by running into the steamfeed pipe 14 at a pointdirectly adjacent to the hollow frame part, so as to equalize at alltimes the pressures in the drying-cylinders and trap. The drawingillustrates the pipe 19 passing to the lower frame member 12; but it mayalso be applied to the upper frame member 11 in the same manner. Saidpipe 19 is provided with an air-vent cook 20 and with a globe or handvalve 21, the globe or hand valve lying between the air-vent cock 20 andthe drying-cylinder.

In the operation of the apparatus it is first necessary to expel the airfrom the dryingcylinders. To do this, the valve 21 should be closed, theair-vent cook 20 should be opened, and the valves 15 of the pipes 15also opened. Steam is then admitted into the drying-cylinders throughthe pipes 14, causing air to be blown out through the pipes 15 into thetrap and thence into the pipe 19 and out of the vent-cock 20. After allof the air has been expelled steam will begin to escape from thevent-cock 20, and this should then be closed and the valve 21 opened.The operation of the apparatus will then become normal, the steamentering the cylinders and the water of condensation being withdrawnthrough the pipes 15 and their connections, as explained in the Paulpatent above referred to. When sufficient water accumulates in the trap,the same will be automatically expelled by the operation of the trap, aswill be understood from the prior art.

As shown in Fig. 3, the pipes 15 have downwardly-extending legs 15,located in the cylinders, with scoops 15 attached to their ends, thesepipes revolving with the cylinders and gathering the water ofcondensation therefrom each time that the pipes reach a positionextending downward from the axial shafts of the drums. This causes thewater to be expelled from the steam-cylinders in pulsations or gusheswhich tend to bring about successive increases of pressure within thetrap, thus disturbing the uniform operation thereof. This, however, isavoided by the equalizing-pipe 19, which places the steamspace of thetrap in communication with the steam-space of the drying-cylinder, andthereby maintaining a uniform pressure within these two vessels. Bymeans of my invention, therefore, I not only provide very simple andefficient means for removing the air from the cylinders at the beginningof the operation, but I also prevent sudden rises of pressures in thetrap and the erratic action incident thereto.

Various changes in the form, proportions, and minor details of myinvention may be resorted to without departing from the spirit and scopethereof. 1 consider myself entitled to all such variations as may liewithin the scope of my claims.

Having thus described my invention, I claim as new and desire to secureby Letters Patent 1. The combination with a drying-cylinder, of meansfor withdrawing the air and water therefrom, a trap to which said meansdischarge, and devices for venting the air from the trap. V

2. The combination with a drying-cylinder, of means for discharging theair and water therefrom, a trap to which said means lead, a pipe passingfrom the upper part of the trap, and an air-vent valve in said pipe.

3. The combination with a drying-cylinder, of means for discharging theair and water therefrom, a trap to which said means lead,

and an air-vent valve communicating with the trap for the purposespecilied.

t. The combination with a drying-cylinder, of means for conducting thewater and air therefrom, a trap to which said means dis charge, anequalizing-pipe establishing communication between the trap and thecylinder for the purpose specified, and an air-vent devicein saidequalizing-pipe.

5. The combination with a drying-cylinder having a steam-supply pipecommunicating therewith,of means for withdrawing the water from thecylinder, a trap to which said means lead, an equalizing-pipe extendingfrom the upper part of the trap to the steam-supply pipe of the cylinderdirectly adjacent to the cylinder for the purpose specified, and anairvent device in the equalizing-pipe.

6. The combination with a drying-cylinder having a steam-supply pipecommunicating therewith, of means for withdrawing the water from thecylinder, a trap to which said means lead, an equalizing-pipe extendingfrom the upper part of the trap to the steam-supply pipe of the cylinderdirectly adjacent to the cylinder for the purpose specified, an air-ventvalve in said equalizing-pipe, and a vent-cock in said pipe between theair-vent valve and the steam-supply pipe of the drying-cylinder.

7. The combination with a drying-cylinder, of means for withdrawing theair and water therefrom, a trap to which said means discharge, thedischarge of said means to the trap being located above the normalwater-line thereof, whereby to permit air to enter the trap, and devicesfor venting the air from the trap.

8. The combination with a drying-cylinder, of means for conducting theair and water therefrom, a trap to which said means discharge at a pointabove the normal water-line of the trap, whereby to permit the airtopass into the trap, an equalizing-pipe establishing communicationbetween the trap and cylinder, and an air-vent device in saidequalizingpipe.

In testimony whereof I have signed my name to this specification in thepresence of two subscribing witnesses.

ROBERT DANIEL TACKABERRY.

Witnesses:

SAMUEL WV. KrNesToN, J .ERE J. COUGHLIN.

